FWIW, the block drain on my 79 has always been plugged.
Dave Camp
----- Original Message -----
From <mgraziano at mindspring.com>
To: <spridgets@autox.team.net>
Sent: Thursday, September 07, 2000 11:39 AM
Subject: Re: UK-spec Midget 1500 hose question
> AHHHHH
>
> Now I get it. That's where a draincock is supposed to be. It's not
supposed to cycle water at all. Read your Haynes manual under "Changing
Coolant". They not only mention this draincock, but also tell you where it
is on the engine. That's the exact location.
>
> I think mine was plugged.
>
> Michael
>
>
>
>
>
> Trevor Boicey <tboicey@brit.ca> wrote:
> > mgraziano@mindspring.com wrote:
> >
> > OK. From memory.
> >
> > There are two "T"s in the system behond the engine. One on the intake
> > manifold (built in) and one built into the pipe that runs from the water
> > pump housing straight back under the exhaust manifold. I saw both on
your pictures.
>
> Indeed, and I have figured it out that I need a third, which I also
> have
> in my pictures.
>
> > I saw no block connection other than the lead back into the waterpump
> > housing. I think the block gets cooled on a different leg of the
coolant
> > system. Where is this block connection you have?
>
> The block is cooled seperately by the big hoses up front, but
> this connection seems to be used to "dump" water from the
> rear engine area. Perhaps there is a strong pull there
> that helps heater flow?
>
> Ok, so based on your email and some serious thought I think
> I have it figured out.
>
> Here's the picture I took before I took it apart, and I'm
> putting it back almost the same:
>
> http://www.brit.ca/~tboicey/midget/pics/midget_pulling_engine_1.jpg
>
> I didn't realize until last night but the ZS manifold also
> has a built in tee, it's just a different geometry than
> the SU one so it didn't show as obviously.
>
> The hose flow seems to be:
>
> - Manifold outlet TOP connection goes into water switch. This
> is the END connection on a stock SU, in the pic it's missing.
> - Manifold bottom connection goes to under-manifold-pipe SIDE
> connection. In the pic this one is missing too but the pipe
> is still there and aimed roughly at the camera.
> - Under-pipe END connection goes to heater top entry.
> - Heater bottom entry goes to the switch's other outlet, but
> it does this through a Tee fitting.
> - The tee fitting branches off a 3/4 inch pipe that goes
> into the block fitting.
>
> Perhaps on your car the block fitting is blocked off and
> serves as a drain only? It's basically straight under the
> rear-most exhaust port, it's hooked up in the picture.
>
> --
> Trevor Boicey, P. Eng.
> Ottawa, Canada, tboicey@brit.ca
> ICQ #17432933 http://www.brit.ca/~tboicey/
> "Let me handle this, I speak Yokel..." - Duckman
>
>
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